doc api

@@ -11,11 +11,13 @@
 - RequestBody:
 
 ```json
-    // 登录凭证
-    private String jsCode;
-    // 用户信息
-    private String nickName;
-    private String avatarUrl;
+{
+  // 登录凭证
+  "jsCode": "wx_jsCode",
+  // 用户信息
+  "nickName": "user_nickName",
+  "avatarUrl":"user_avatarUrl"
+}
 ```
 
 - ResponseBody:
@@ -27,4 +29,49 @@
     // body
     private String openId;
     private String wxToken;
-```
\ No newline at end of file
+```
+
+##### 2. 通过邀请码，建立邀请关系
+
+- URL: {{localhost}}/boxfish-online-card/wxUser/addRelationship
+- Method: POST
+- RequestBody:
+
+```json
+{
+    "openId": "user_openId",
+    "invitationCode": "invitation_code"
+}
+```
+
+- ResponseBody:
+
+```java
+public static class Response {
+    // status
+    private ResponseStatus status;
+    private String message;
+
+    // 分享人信息
+    private String sourceOpenId;
+    private String sourceNickName;
+    private String sourceAvatarUrl;
+    // 领取人信息
+    private String targetOpenId;
+    private String targetNickName;
+    private String targetAvatarUrl;
+
+    // 用户当前状态
+    private Boolean flagUserHasObtain;  // 是否领取课程
+    private Long invitationCode;        // 已经领取，返回当前用户的邀请码
+}
+```
+
+
+
+
+##### 3. 微信用户获取全部的教材版本、年级信息
+
+- URL: {{localhost}}/boxfish-online-card/textbook/version/getTextbookGrade
+- Method: GET
+- RequestBody:
\ No newline at end of file